casting machine



Sept. 22, 1925.

c. M. NGELLi' AL CASTING MACHINE F le i Oct. '2. 192; 4 Sheets-Sheet 1'Sept. 22, 1925. 7 1,554,942

' c. M. ANGELL ET AL CASTING MACHINE FiledOct. 2, 1923 4 $heets-Sheet 24 Sheets-Sheet 5 M A Emmi c. M. ANGELL ET Al.

CASTING MACHINE Filed Oct. 2. 1923 m n w Sept. 22, 1,925.

. 1,554,942 '6. M. ANGELL ET AL CASTING mcam:

Filed Oct. 2. 192a 4 Sheets-Sheet 4 Patented $ept.192 5 u'urrao sTArssPATENT. orrics."

OEEI'EB I. ANGEL! AND HARRISON H. HOOD, OF CHICAGO, ILLINOIS, ASSIGNOBS"IO VES'IA. BATTERY CORPORATION, OF CHICAGO, ILLINOIS, A CORPORATION OFILLI- cas'rme nacnmn.

1 Application at October a, 192:. Serial 1T0. 86,109.

To all whom it may concern: I

Be it known that we, (1) CHESTER M. AN- GELL, and 2) Hlmmsox H. Hoon,citizens of the United States, residing at (1) Chic 0, (2) Chicago, inthe county of (1) (lookffil) Cook, and State of (1) Illinois, (2)Illinois, have invented certam new and useful Improvements in CastingMachines, of which the following is a specification.

This invention relates to casting machines and particularly to machinesfor casting relatively small articles in permanent molds.

Objects of the invention are toprovide a simple and eflicient machinewhich will be automatic in operation and in which cast articles may bemade at a ra id rate. A

further object of the invention is to rovide a casting machine in whichthe mol' cavit will be completely and quickly filled wit the moltenmetal, thus insuring the reduction of perfect castings. Morespecifically, an object is to provide a casting machine having a pair ofcomplementary mold sections, one of which is heated to insure a quickand com lete filling of the mold cavity and the ot or is cooled topromote the rapid solidification of the cast metal.

These and other objects of our invention which will be apparent from thefollowing description are attained in the embodiment of our inventionwhich is illustrated in the accompanying drawings in which,

Fig. 1 is an elevation of the machine as seen when looking down upon thesame at an angle of Fig. 2 isa side elevation;

. Fig. 3 is a vertical section taken on line 3-3 of Fig. 1;

Fig. 4 is a section taken on line 4--4 of Fig. 1 and showing a bottomelevation of Fig. 8 is a fragmentary vertical section showing thearrangement of the knock-out pins in the movable mold section.

In the drawings, the supporting base 1 of the. casting machine is shownas a hollow casting having an inclined upper face 2 upon which the moldsupporting elements are mounted. A plate 3 which 1s attached to theupper or rear portion of the top-face of the base 1 is provided with apair of sleeves 4, through which pass rods. 5 upon which the hollowcooling head 6 of the upper mold section is'mounted. The cooling head 6is not rigidly connected to the base but is slidable upon the rods 5 andis pressed upwardly against the nuts or heads of the rods 5 by springs 7which are arranged between the lower face of the head 6 and enlargedport-ions 8 formed on the rods 5 and resting upon the upperfaces of therespective sleeves 4 of the supporting plate. The upper mold section 9is attached to the lower face of the cooled head 6, as by bolts 10, and

the mold section is provided with a plurality of the mold section 9. Theheating pas- 35 sages in the manifold 15 are provided with suitableports to which pipes 16 may be attached. These pipes, together with pwhich are fixed in the openings 14 o? the 9 provide for the circulationcastin throug the mold section and manifold of a the upper mold section;a

Fig. 5 is a section taken on line 5-5 of Fig. 1 and showing a topelevation of the lower or movable mold section;

FigL 6 i a vertical section taken on line 66 of Fig. 1 and illustratingone of the valves and associated elements;

Fig. 7 is a section taken on line 7-7 of Fig. 1 and illustrating detailsof the crosshead construction and valve operating mechanism; and

suitable heating medium, such as aseous products ofcombustion. The he 6is cooled by water which is circulated through 'the head by means ofpipes 17 and a sheet of mica 17 is placed between the adjacent faces ofthe cooled head 6 and the heated moldsection 9 to prevent the conductionand dissipation of heat into the machine itself. :The manifold 15 isprovided with an inlet 18 for the molten metal and an internal chamber19 which has ports communicating with the several passages 11 of the.bar 24, the upper ends of the stems being provided with adjusting nuts'25. Headed rods or bolts 24' which are fixed to the valve lift bar 24and slide through openings in the valve spring bar 22 serve as guidesand adjustable stops limiting the-upward movement of the valve lift bar.

The lower or movable mold section 26 is provided with. a plurality ofpassages 27 through which water or other cooling fluid may be circulatedby means of the headers 28. The pipes 29 which are connected to theports of the headers are provided with flexible or telescoping sections,not shown,

to permit the circulation of fluid through the movable mold section. Themoldv section 26 iscarried by a cross-head 30 having lateral 'V-sha edflan es 31 which are slidably mounted in justable' bearing -.plates 32on the plate 3. The cross-head 30 is reciprocatedby a crank 33 throughan arm 34 and rod 35, but is not positively connected to the rod 35. Therod 35 passes through the lower end of the cross-head 30 and is providedwith a slot 36 through which passes a pin 37 which is fixed to thecross-head. A spring 38 arranged between end of the rod 35 and atransverse bar 39 on the cross-head tends to force the crossheadupwardly. This yieldable connection between the crank arm and thecross-head provides for a period of dwell during which the two moldsections remain in engagement. "l

The mechanism for operating the valves comprises a cross-bar 40 fixed tothe head of the reciprocating rod 35 and two rods 41 which are carriedby the cross-bar and guided by hearing sleeves 42 mounted on the plate3. The upper ends of the rods 41 engage the valve 11ft barg2T4 toopenthe. valves 20 after the two mold SBCtlOIlSl'ZEIlgage, the valvesremaining open for the.

major portion of the period of dwell dur' ing which the mold sectionsare in engage-- ment. Preferably the rods 41 are not rigidlyconnected tothe cross-bar 40 but are slidableYtherein and are yieldably held bysprings 43.The crank shaft 33 may be operated in any suitable-manner asfrom a 'drive shaft 44 through gears 45, 4:6.-

To remove the completed article from the lower mold section, knock-outpins 47 are cavity 48 by springs 49. As the mold section 26 approachesits lowermost position the knock-outpins 47-engage the plate 49 and thefurther movement of the mold section ejects the finished casting fromthe mold. Due to the inclined arrangement of the mold section, thecasting can readily slide from the mold onto an inclined discharge chute50.

As one example of articles which may be formed in the casting machine,Figs. 4 and 5 show theoutline of complementary mold cavities 12, 48which will produce two battery grids joinedat their lower edges. Inactual use for this purpose it is obvious that the mold sections areprovided with suitable-projecting ridges or surfaces to form the desiredgrid-work but these details have specific use of the machine is not anessential feature of our invention.

The operation of the casting machine will now be described. A heatingmedium is,

been omitted from the drawings since this through the movable moldsection 26 and the upper header 6. The temperature of the upper moldsection should be somewhat higher than the melting point of the metal tobe cast before the machine is started. Molten metal is piped into themanifold 15 from a large melting pot under pressure (gravity orotherwise) which need not be great since the high temperature of theupper mold section insures a rapid and complete filling of the moldcavity. When power is applied to the drive shaft 44, the crank armoperates through the rod 35 and cross-head 30 to move the lower moldsection into engagement with the stationary mold section, and thesesections remain in engagement for an appreciable period due to theyielding of the spring 38. The continued movement of the rod 35 afterthe mold sections are in engagement operates, through the cross-bar 40and rods 41, to raise the valve lift bar 24 and open the several valves.The continued rotationof the crank 33 moves the rod 35 downwardly towithdraw the valve operating'rods 41 and thereafter to lower'the movablemold sec- 'movable mold approaches its lowest position theiknock-out'pins 47 eject the casting which falls upon the discharge chute 50.

The speed er. operation of the machine is suchthat the period of dwellafter the mold is completely-filled is of such duration that the coldmold section 26 chills the casting to such an extent that it will holdits shape as the mold sections separate. As soon as the sectionsseparate the chilling efiect is greatly increased as the newly castarticle lies entirely on the cold section of the mold and the metalsolidifies quickly. By the time that the casting is ejected by theknock-out pins the metal has completely solidified and cannot be.damaged by the ejecting operation. Within the limits of adjustmentafiorded by the clearance of the pin 37 in slot 36, the period of dwellfor a given speed of rotation of the crank shaft 33 may be controlled byraising or lowering the upper mold'section by adjustingl sition of thenuts on the upper en s of the rods 5.

In formin battery grids a suitable leadantimony al y 1S employed butobviously 'the machine may other articles of sai dsections,

be employed for casting his or of other metals and alloys. It will beunderstood that the invention is not limited to the specific em-'bodiment. herein described as varlous. changes may be made in theseveral parts, their relative size, shape, and location.

We claim: j

l. A casting machine comprising a pair of relatively movable sectionsdefining a mold cavity at their adjacent faws, a passage through one ofsaid sections for introducing molten metal to said mold cavity,means'for heating the said mold section and means for cooling the othermold section. I

2. A casting machine comprising a pair of relatively movable sectionsdefining a shallow mold cavity at their adjacent faces, a

plurality of passages through one of said sections for introducing moten metal into said cavity, means for heating the said mold section andmeans for cooling the other of said sections.

3. A casting machine comprising a pair of relatively movable sectionsdefining a shallow mold cavity at their adjacent'faces, a plurality ofpassages through one of said sections for introducing molten metal intosaid cavity, means for heating the said mold section, means for coolingthe other of into and out of engagement and means operative to permitthe flow of metal through said passages after the sections come intoengagement. a

4. A castingmachine comprising a heated mold section, a 'passage in'saldmold section for introducing molten metal into the mold cavity, a valvein said passage, a cooled mold section, means for moving said moldsections into engagement and means for operating said valve.

5. A casting machinecomprising a heated mold section, a'passa'ge insaid' mold section for introducing molten-metal into said mold cavity,said passage terminating in a valve seat located substantiallyat themold cavity, a valve for cooperation with said seat, a

. cooled mold section,

the pomeans for moving said sections means for. moving said sectrfonsinto engagement and means for operatmg said valve.

6. A casting machine comprising a sup porting base, a mold sectioncarried thereby, a passage through said mold section, a valve in saidpassage, means including a yielding element for translating said movablemold section, and

valve operating mechanism carried by said means.

7. A castlng machlne comprlsing a supporting base, a heated mold sectioncarried passages therein for inthereby and having troducing molten metalinto the mold cavity, a cooled mold section carried upon a reciprocatingcross-head, crank mechanism for operating said cross-head and adapted tobe continuously rotated, a yieldable connection between said cross-headand said crank mechanism, and

means operated by said a movable mold section,"

crank mechanism for-controlling the flow of molten metaLthrough saidpassages and into the mold cavity.

8. In a casting machine, a longitudinally movable cross-head, a moldsection carried thereby, a reciprocating rod, -a yieldable elementbetween-said cross-head and said rod and means carried by said rodadapted to operate valve mechanism for controlling the flow of metalinto said mold section.

'9. A casting machine comprising a supporting base, a stationary moldsection, a movable mold section, a reciprocating crosshead upon whichsaid is mounted, a reciprocating rod, ayieldable element between saidcross-h rod, a passage for introducing material into the cavity betweensaid mold sections, a

valve in said passage and valve operatingmechanism carried by said rod10. Acastlng machine comprising, an upper and a lower mold section,means for movingthe lower mold section into and out of engagement withthe upper'mold section, means for heating the upper mold section,

means for cooling the lower mold section and means for ejecting a castartic e from the mold cavity of the upper faceof said lower =moldsection being inclined to the horizontal, whereby the ejected castingmay drop away from said lower mold section.

'11. A casting machine comprising a supa fixed and a reciprocatingframe, the movporting frame, mold section carried by said able sectionbeing arranged below the fixed section and with its upper face inclinedto the horizontal, a cooling head positioned be-.

tween said fixed section and the su porting frame, meansfor heating saidfixed section, passages in said fixed section for introducing moltenmetal into the mold cavity, said passages terminating in valve seatslocated substantially at the mold cavity, valves coopermovable moldsection the lower mold section, i

ead and said ll v 1,554,942

ating with said valve seats; means fof coolated from said crank;mechanism for conmg said movable section, a cross-head by trolhngsald'valves.

.which said movable section is carried; crank In testimony whereof, weafiix our sig- 10- mechanism for reciprocating said cross-head na ures 5and adapted to be continuously operated, la 4 1 yieldable connectionbetween said crank 1 i CHESTER M. ANGELL.

mechanism and cross-head, and means oper- 2 HARRISON HYHOOD.

